Material and build: This ballast controller is made of quality metal, rubber and ABS. It is wearresistant, sturdy and durable. Installation: Plug and play. No modification or programming required. Direct connection to your vehicle. Performance benefits: Starts quickly and draws a small current. Can improve irradiation distance and lighting range. Advanced electronic ignition technology provides stable voltage output, reduced interference, minimal flicker, and good resistance to damage. Function: HID headlight ballast powers the headlight bulb and regulates voltage and current to ensure light is uniform and stable without flicker or attenuation. Each ballast is designed to be directly connected to your vehicle without coding or programming. Compatibility and practicality: Designed for HID headlight systems and plugandplay installation. No coding or programming needed for direct vehicle connection. Use scenarios: Replacing a failed ballast on a sedan, SUV, or truck to restore reliable headlight performance. Upgrading an aging HID setup to achieve more consistent beam and quicker startup during night driving. Keeping a spare ballast on hand for DIY repairs or fleet maintenance to minimize downtime.